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/**
* mds — A micro-display server
* Copyright © 2014, 2015, 2016 Mattias Andrée (maandree@member.fsf.org)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MDS_MDS_H
#define MDS_MDS_H
#include <sys/types.h>
#include <stdio.h>
/**
* Read a PID-file and determine whether it refers to an non-existing process
*
* @param f The PID-file
* @return Whether the PID-file is not longer used
*/
__attribute__((nonnull))
int is_pid_file_reusable(FILE* f);
/**
* Parse an LF-terminated string as a non-negative `pid_t`
*
* @param str The string
* @param n The length of the string, excluding LF-termination
* @return The pid, `(pid_t)-1` if malformated
*/
__attribute__((pure, nonnull))
pid_t parse_pid_t(const char* str, size_t n);
/**
* Start master server and respawn it if it crashes
*
* @param fd The file descriptor of the socket
* @return Non-zero on error
*/
int spawn_and_respawn_server(int fd);
/**
* Create a directory owned by the root user and root group
*
* @param pathname The pathname of the directory to create
* @return Non-zero on error
*/
__attribute__((nonnull))
int create_directory_root(const char* pathname);
/**
* Create a directory owned by the real user and nobody group
*
* @param pathname The pathname of the directory to create
* @return Non-zero on error
*/
__attribute__((nonnull))
int create_directory_user(const char* pathname);
/**
* Recursively remove a directory
*
* @param pathname The pathname of the directory to remove
* @return Non-zero on error
*/
__attribute__((nonnull))
int unlink_recursive(const char* pathname);
#endif
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